TYPES OF COMPUTER NETWORKS: A computer networks is a communication system connecting two or more computers that work together to exchange information & share resources. A network may consist of microcomputers or it may integrate microcomputers or other devices with large computer. Networks can be controlled by all nodes co-ordinarily & supply all resource. These networks differ in geographical size. There are three important types of networks. 1. Local Area Network 2. Metropolitan Area
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IT220 Chapter 7 1.What’s a routing table? Keeps track of the routes to use for forwarding datat to its destination 2. What is the most common static route used in a host computer? Default gateway 3. What command is used to view a PC computer ’s routing table? Netstat –r /route prints 4. What is meant by a O.O.O.O network address entry with a subnet mask of 0.0. 0.0. in a PC ’s routing table? Default route 5. What is the 127.0.0.1 IP address and what is it used for?loopback‚ the
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Computer Storage Devices Storage devices are used in order to store various items such as programs‚ data and instructions. Storage was used as early as 1804 by hole punching paper cards in order to control machinery. Without storage‚ the computer programs and files that exist now would not be possible. There are many different devices used for storage today such as hard drives‚ floppy drives and CD-Rom drives. Hard drives come in all computers and are the main storage device. An average hard drive
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G. L. Bajaj Institute of Management and Research Greater Noida TERM PAPER ON DETAIL STUDY OF OUTPUT DEVICES OF COMPUTER Submitted to: Submitted by: Prof. Loveleen Gaur. 25. Monika Priyadarshni. GLBIMR 26. Md. Altaf Hussian Khan. GREATER NOIDA 27. Naman Jain. 28. Naveen kumar. 29. Nikhil Kumar. 30. Prakash Pandey. ACKNOWLEDGEMENT We would like to express our gratitude to all those who gave us the possibility to complete this term
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ISO-OSI 7-Layer Network Architecture This lecture introduces the ISO-OSI layered architecture of Networks. According to the ISO standards‚ networks have been divided into 7 layers depending on the complexity of the functionality each of these layers provide. The detailed description of each of these layers is given in the notes below. We will first list the layers as defined by the standard in the increasing order of function complexity: 1. Physical Layer 2. Data Link Layer 3. Network Layer 4.
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for upstream and downstream data transmission on the same conductors‚ which is also an example of frequency duplex. Where frequency-division multiplexing is used as to allow multiple users to share a physical communications channel‚ it is called frequency-division multiple access (FDMA). FDMA is the traditional way of separating radio signals from different transmitters. In the 1860s and 70s‚ several inventors attempted FDM under the names of Acoustic telegraphy and Harmonic telegraphy. Practical FDM was only achieved in
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the unit of data sent or received at each of the following layers? a. application layer:Message b. network layer:Datagram c. data-link layer:Frame Q2-12) When we say that the transport layer multiplexes and demultiplexes application layer messages‚ do we mean that a transport-layer protocol can combine several messages from the application layer in one packet? Explain. The TCP/IP protocol suite uses several protocols at some layers‚ we can say that we have multiplexing at the source and demultiplexing
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COMPUTER COMMUNICATION NETWORKS Objectives • • • • • What is telecommunication History of telecommunication Role of telecommunication in Organizations Interpersonal communication applications Computer networks What is telecommunication? “Transmission of data or audible/visible information by electrical/electronic means” e.g. telephone‚ telegraph‚ radio‚ television‚ computer networks (Internet) Basic elements 1. Transmitter : takes information and converts it to a signal 2. Transmission
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Computer Network Specialist Abdool Samad GLC2O0-B Mr. Shin Nov. 6th ‚ 2013 The reason I have chosen a Computer Network Specialists is because I love computers of what they do and what they are capable of doing and how it has helped the humans thrive and succeed in ways other species can’t. Computer Network Specialists develop‚ install‚ and maintain the networks that connect computers to each other. Their duties are to set-up computers and install
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EC2043 WIRELESS NETWORKS UNIT I PHYSICAL AND WIRELESS MAC LAYER ALTERNATIVES PART – A (2 Marks) 1. Name five design consideration in selecting a modulation scheme for a wireless networks. 2. Why is out of band of radiation an important issue in designing modulation scheme? 3. Why is PPM used with IR communication instead of PAM? 4. Name four space diversity techniques. 5. What are the advantages of high efficiency voice band modems
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